#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<random>
using namespace std;
mt19937 RAND(random_device{}());
int n=1000000;
int main()
{
	freopen("snake.in","w",stdout);
	int d;
	for (int i=1;i<=n;++i)
	{
		d=RAND()%3;
		if (!d) cout<<'R';
		else if (d==1) cout<<'B';
		else cout<<'G';
	}
	cout<<endl;
	return 0;
}
